Biology Test 182

Question 1
4 / -1

How many types of phenotypes would be produced in F₁ progeny in the following cross that obeys Mendel's law of Independent Assortment -

A A B B C C × a a b b c c

A
1

B
64

C
27

D
8

Question 2
4 / -1

Out of 2000 plants in the F₂ generation of a dihybrid plants, how many plants are homozygous for only one character ?

A
1000

B
1500

C
250

D
500

Question 3
4 / -1

In cross between the pea plants homozygous for Round and Yellow seeds and Wrinkled and Green seeds the ratio between the plants having Round seeds and Wrinkled seeds in F₂ generation will be -

A
9 : 7

B
3 : 1

C
1 : 1

D
2 : 1

Question 4
4 / -1

If two different alleles of a gene come together, only one is able to express itself this is called :-

A
Law of dominance

B
Law of segregation

C
Law of independent assortment

D
Law of co-dominance

Question 5
4 / -1

About genotype 'Rr' select the incorrect statement :-

A
Allelic gene pair

B
They control common character

C
They share common locus

D
Can be present on non homologous chromosome

Question 6
4 / -1

Which of the following is the unit of inheritance ?

A
Phenotype

B
Gene

C
Genome

D
Chromosome

Question 7
4 / -1

Which of the following cross will produce only heterozygous progenies ?

A
Tt × Tt

B
TT × Tt

C
Tt × tt

D
TT × tt

Question 8
4 / -1

Which one of the following is not correct regarding mendelian dihybrid cross ?

A
F₂ generation is obtained from the cross between F₁ plants with one of the two parental plants.

B
The gametes produced by F₁ plants are of 4 types in 1 : 1 : 1 : 1

C
The F₂ phenotypic ratio is 9 : 3 : 3 : 1

D
Law of independent assortment can be explained on the basis of this cross

Question 9
4 / -1

In a dihybrid cross in garden pea 1024 plants were obtained in F2 generation. How many plants will show recessive trait for both characters ?

A
576

B
64

C
256

D
284

Question 10
4 / -1

Read the following five statements (A–E) :

(A) Mendel's approach of using mathemetics to explain biological phenomena was totally new and unacceptable to many of the biologists of his time.
(B) Pea plant has many contrasting traits.
(C) Gene which controls more than one character is called as pleiotropic gene.
(D) Hybrid vigour is develops due to homozygosity.
(E) Every gene is DNA but every DNA is not gene.

How many of the above statements are correct?

A
Five

B
Four

C
Three

D
One

Submit Test

Biology Test 18...

Question 1

1

64

27

8

Question 2

1000

1500

250

500

Question 3

9 : 7

3 : 1

1 : 1

2 : 1

Question 4

Law of dominance

Law of segregation

Law of independent assortment

Law of co-dominance

Question 5

Allelic gene pair

They control common character

They share common locus

Can be present on non homologous chromosome

Question 6

Phenotype

Gene

Genome

Chromosome

Question 7

Tt × Tt

TT × Tt

Tt × tt

TT × tt

Question 8

F2 generation is obtained from the cross between F1 plants with one of the two parental plants.

The gametes produced by F1 plants are of 4 types in 1 : 1 : 1 : 1

The F2 phenotypic ratio is 9 : 3 : 3 : 1

Law of independent assortment can be explained on the basis of this cross

Question 9

576

64

256

284

Question 10

Five

Four

Three

One

User

Question Analysis

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F₂ generation is obtained from the cross between F₁ plants with one of the two parental plants.

The gametes produced by F₁ plants are of 4 types in 1 : 1 : 1 : 1

The F₂ phenotypic ratio is 9 : 3 : 3 : 1